Radial tire

A radial tire, the tire comprising a tread portion, a pair of sidewall portions, a pair of bead portions, wherein each bead portion includes a bead core, a carcass reinforcing ply including a ply turnup placed at each bead core, each ply turnup including a radially outward end forming a ply ending;

• and a chipper being disposed at each ply turnup with a radially outward chipper end that is radially below the ply ending;
• wherein the profile of the outer surface of the sidewall portion is at a distance G from the carcass reinforcing ply from the most axially outward point of the said outer surface until point A, and joins the outer surface of the bead portion at the point B wherein the outer surface of the sidewall portion follows two successive curves with a first curve extending from the point A is having a center of curvature positioned axially outward of the carcass reinforcing ply and a second curve joining the point B having a center of curvature positioned axially inward of the outer surface of the tire;
• wherein the profile of the outer surface of the sidewall portion in the portion extending from points A to B is tangent to a circle C1 centered on the ply ending and having a radius R1 ranging from 5 to 15 mm, wherein there is an inflection point between the first curve and the second curve on the profile of the outer surface of the sidewall portion at the point where it is tangent to circle C1, wherein circle C1 is the smallest diameter circle centered on the ply ending which extends to any point on the outer surface of the sidewall;
• wherein the distance G from the carcass reinforcing ply to the most axially outward point of the sidewall is constant through the sidewall portion of the tire, and wherein there is only one inflection point on the outer surface of the tire situated between the sidewall portion of the tire and point B;
• wherein the profile of the outer surface of the sidewall portion at the point B is tangent to a circle C2 centered on the radially outward chipper end;
• and
• wherein the distance G is equal to or lower than the radius R1 of the circle C1, and wherein the distance G does not vary by more than 0.5 mm.